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Megger MOM2 User Manual

Manual is about: Micro-ohmmeter

Summary of MOM2

  • Page 1

    Www .Megger.Com user’s manual mom2 mom2 win micro-ohmmeter art no. Zp-bd03e doc. Bd0333fe v06a 2016.

  • Page 3: Micro-Ohmmeter

    Mom2 mom2 win micro-ohmmeter notice of copyright & proprietary rights © 2013-2016, megger sweden ab. All rights reserved. The contents of this manual are the property of megger sweden ab. No part of this work may be reproduced or transmitted in any form or by any means, except as permitted in writte...

  • Page 4: Contents

    4 mom2 zp-bd03e bd0333fe contents 1 safety ................................................................... 6 1.1 safety instructions ............................................... 6 1.2 symbols on the instrument ................................. 7 2 introduction ...................................

  • Page 5

    Bd0333fe zp-bd03e mom2 5 manual connecting .......................................... 35 7.5 read the measurement log ............................... 37 export data to file ............................................ 38 delete all data on the instrument ..................... 38 7.6 user settings .....

  • Page 6: Safety

    6 mom2 zp-bd03e bd0333fe 1 safety 1 safety 1.1 safety instructions for your own safety and to get the maximum benefit from your instrument, please ensure that you read and understand the following safety instructions and warnings before using the instrument. Read and comply with the following instru...

  • Page 7: 1.2 Symbols On The

    Bd0333fe zp-bd03e mom2 7 1 safety 1.2 symbols on the instrument caution, refer to accompanying docu- ments. Protective conductor terminal. Weee, waste electrical and electronic equipment. Please utilize your lo- cal weee collection facilities in the disposal of this product and otherwise observe all...

  • Page 8: Introduction

    8 mom2 zp-bd03e bd0333fe 2 introduction 2 introduction the mom2 is designed to measure the resistance of circuit breaker contacts, bus-bar joints, contact ele- ments in bus-bars and other high-current links. When contact resistance rises because of oxidation, loosened or improperly tightened threade...

  • Page 9: 2.2 Dualground – Both

    Bd0333fe zp-bd03e mom2 9 2 introduction 2.2 dualground – both sides grounded with mom2 it is possible to make measurements according to the dualground™ method. The most im- portant advantage is improved safety but the method is also easier and saves time. The number of tasks is reduced when the grou...

  • Page 10: Mom2 Overview

    10 mom2 zp-bd03e bd0333fe 3 mom2 overview 3 mom2 overview 3.1 the instrument 1 2 4 5 6 7 8 3 9 10 11 top view 12 13 14 bottom view.

  • Page 11

    Bd0333fe zp-bd03e mom2 11 3 mom2 overview 1. Current output terminal (-) 2. Current output terminal (+) 3. Protective conductor terminal 4. Display ▪ the display offers a combination of analogue arc and a dual digital readout: ▪ analogue arc: shows the capacitor charge. ▪ dual digital display: large...

  • Page 12: 3.2 Accessories

    12 mom2 zp-bd03e bd0333fe 3 mom2 overview 3.2 accessories ▪ test cables with kelvin probes (one with trigger) or test cables with kelvin clamps ▪ transport case ▪ charger ▪ rubber holster ▪ carrying strap ▪ belt clip ▪ mom2 win 3.3 optional accessories test cables with kelvin probes (current & sense...

  • Page 13

    Bd0333fe zp-bd03e mom2 13 4 functions and set up.

  • Page 14: Functions And Set Up

    14 mom2 zp-bd03e bd0333fe 4 functions and set up 4 functions and set up 4.1 general internal software version when turning the function selector from off to any position the display will shortly show a number e.G. 008 and then during five seconds the internal soft- ware version e.G. "01c" (revision ...

  • Page 15: 4.3 Bluetooth –

    Bd0333fe zp-bd03e mom2 15 4 functions and set up 4.3 bluetooth – set / display abbreviations set set spc set-up pc shs set-up headset prd paired e-d enable / disable (headset) ena enabled (headset) dis disabled (headset) o processing era erase all addresses enable / disable bluetooth 1] use the ◀ ▶ ...

  • Page 16: 4.4 Clock – Clk

    16 mom2 zp-bd03e bd0333fe 4 functions and set up 8] check and click next. 9] select the second option, see below, enter "0000" and click next. 10] display shows "prd" and set up is complete. Note the procedure to pair and assign com port varies depending on the equipment. How to pair a headset 1] se...

  • Page 17: 4.5 Minimum Current – I

    Bd0333fe zp-bd03e mom2 17 4 functions and set up 3] press and hold ok key until digit start to blink. 4] set level (1 to 5) using the ▲ ▼ keys. 5] press ok key. 6] press ▶ or ◀ to return. 4.5 minimum current – i min set / i min display abbreviations sel select set-up 1] select set / i min. Present s...

  • Page 18: 4.6 Data Logger – Log

    18 mom2 zp-bd03e bd0333fe 4 functions and set up 4.6 data logger – log the data memory can store totally 190 measurements and this capacity is shared by the two log modes. Set / log display abbreviations / description sel select off off 1a1 label for breaker, phase, interrupter 1234 running numbers ...

  • Page 19: 4.7 Pass/fail – P/f

    Bd0333fe zp-bd03e mom2 19 4 functions and set up 4.7 pass/fail – p/f in the p/f position you can enable and set the limit for the pass/fail function. If the measured value exceeds the set limit it will result in a notification on the dis- play and by an audio signal set / p/f display abbreviations s...

  • Page 20: 4.9 Audio Signals

    20 mom2 zp-bd03e bd0333fe 4 functions and set up 4.9 audio signals the mom2 emits different sounds to give an audible information / confirmation of an event / action. The sound is emitted from a built-in buzzer and from the bluetooth headset (optional). The audio signals vary in frequency, low / hig...

  • Page 21

    Bd0333fe zp-bd03e mom2 21 4 functions and set up it is recommended to use the same type of batteries (aa (hr6) 2700 mah nimh) as the original ones. Note it is possible to use standard (non-rechargeable) alkaline cells but then only for test using the 0.1 s measurement position and i > i min. Loosen ...

  • Page 22: Operating Instructions

    22 mom2 zp-bd03e bd0333fe 5 operating instructions 5 operating instructions 5.1 general instructions important regarding all testing read and comply with the safety instructions. Always comply with local safety regulations. Important power supply prepare testing by charging the batteries se section ...

  • Page 23

    Bd0333fe zp-bd03e mom2 23 5 operating instructions set / i min position you select the minimum current to be 50 a or 100 a. Min current guarantee (i > i min) max current (i = i max) suitable for test objects ≤ 2 mΩ recommended for test objects > 2 mΩ capacitor only charged to sufficient level to gen...

  • Page 24: 5.2 Measurement With

    24 mom2 zp-bd03e bd0333fe 5 operating instructions 5.2 measurement with max. Charge, i=i max 1] read the section 5.1 general instructions. 2] if applicable, connect the ground cable (pro- tective earth). 3] make the desired settings in the set options. In this example log and p / f are disabled (set...

  • Page 25: 5.3 Measurement

    Bd0333fe zp-bd03e mom2 25 5 operating instructions 5.3 measurement with minimum current guarantee, i > i min 1] read the section 5.1 general instructions. 2] if applicable, connect the ground cable (pro- tective earth). 3] make the desired settings in the set options. Select i min to 50 or 100 a (in...

  • Page 26: 5.4 Measurement Using P/f

    26 mom2 zp-bd03e bd0333fe 5 operating instructions 5.4 measurement using p/f – pass/fail 1] make the desired settings in the set options select p/f and enter desired limit value. In this example log is set to off 2] turn the function selector to one of the test positions. 3] press the test button on...

  • Page 27: 5.5 Measurement With User

    Bd0333fe zp-bd03e mom2 27 5 operating instructions 5.5 measurement with user defined settings there are three positions for storing user defined settings. These can only be set via a pc with the mom2 win software, see chapter mom2 win. 5.6 measurement using the log function see section 4.6 data logg...

  • Page 28

    28 mom2 zp-bd03e bd0333fe 5 operating instructions 1. The first measurement on the present label shown by a comma. 2. The second measurement in the present memory cell shown by a comma. 3. The third measurement in the present memory cell shown by a comma. 4. Digit for the circuit breaker 5. Letter f...

  • Page 29: 5.7 Measurement Using P/f

    Bd0333fe zp-bd03e mom2 29 5 operating instructions 5.7 measurement using p/f and i min in this example log is set to off. 1] read the section 5.1 general instructions. 2] if applicable, connect the ground cable (pro- tective earth). 3] make the desired settings in the set options. Select p/f and ent...

  • Page 30: 5.8 Testing On Circuit

    30 mom2 zp-bd03e bd0333fe 5 operating instructions 5.8 testing on circuit breakers having a current transformer in the loop if there is a current transformer (ct) in series with the breaker contact to be tested then it is advisable to make some basic checks. Encapsulated or dead tank breakers are th...

  • Page 31

    Bd0333fe zp-bd03e mom2 31 6 application examples.

  • Page 32: Application Examples

    32 mom2 zp-bd03e bd0333fe 6 application examples 6 application examples 6.1 safety important regarding all testing read and comply with the safety instructions. Always comply with local safety regulations. Important note if you are measuring resistance in a circuit breaker or disconnecting switch (i...

  • Page 33: 6.3 Test A Cb Using

    Bd0333fe zp-bd03e mom2 33 6 application examples 6.3 test a cb using dualground you can perform testing with both sides grounded. However the measurement accuracy will be some- what lower with both sides grounded depending on the ratio of the currents – circuit breaker / grounding cables (see sectio...

  • Page 34: Mom2 Win

    34 mom2 zp-bd03e bd0333fe 7 mom2 win 7 mom2 win 7.1 introduction mom2 win is a windows® program that communi- cates with the mom2 micro-ohmmeter instrument. It is used for: ▪ reading measurement data from the instrument and save it to file ▪ configuring the instrument ▪ calibrating the instrument 7....

  • Page 35: 7.3 Start Mom2 Win

    Bd0333fe zp-bd03e mom2 35 7 mom2 win 7.3 start mom2 win 1] click the mom2 icon on the desktop or run the file mom2win.Exe (start->all programs->programma) the program will startup showing the start page. Figure 8.3.1 start page exit mom2 win 1] exit the program by selecting "exit" from the "file" me...

  • Page 36

    36 mom2 zp-bd03e bd0333fe 7 mom2 win 2] choose a com port in the drop down list and click the "connect" button. The program will try to connect to a mom2 instrument over the specified com port. If it is unknown which com port to use the program can scan all available ports until it finds a mom2 inst...

  • Page 37: 7.5 Read The Measurement

    Bd0333fe zp-bd03e mom2 37 7 mom2 win 7.5 read the measurement log 1] click the "measurements" button on the start page or select "measurements" from the "tools" menu. Figure 8.5.1 data dumping dialog. 2] click on the "retrieve all data" button to download all measurements stored in the instrument. A...

  • Page 38

    38 mom2 zp-bd03e bd0333fe 7 mom2 win figure 8.5.3 data dumping finished. The columns can be sorted by clicking the headers and arranged by click-hold and drag. Export data to file 1] click the "save to file" button (this button is not enabled if the list is empty). A "save as" window will be opened....

  • Page 39: 7.6 User Settings

    Bd0333fe zp-bd03e mom2 39 7 mom2 win figure 8.5.4 delete all measurements progress. 7.6 user settings 1] click the program "user" positions" button on the start page or choose program "user" positions from the "tools" menu . Figure 8.6.1 program "user" positions read existing settings 1] select "use...

  • Page 40: 7.7 Calibration

    40 mom2 zp-bd03e bd0333fe 7 mom2 win 7.7 calibration required equipment ▪ stable dc voltage source ▪ calibrated reference voltmeter ▪ reference shunts 1 mΩ and 10 mΩ procedure 1] click the "calibration" button on the start page or select "calibration" from the "tools" menu to switch to the calibrati...

  • Page 41

    Bd0333fe zp-bd03e mom2 41 7 mom2 win 5] the measurement goes on and when it is finished the "r measured" field is filled with the meas- ured resistance value and a new calibration factor for this measurement range is calculated, see fig. Below. Figure 8.7.4 ammeter calibration. 6] click the "verify"...

  • Page 42: Specifications

    42 mom2 zp-bd03e bd0333fe 8 specifications 8 specifications specifications mom2 specifications are valid at fully charged batteries and an ambi- ent temperature of +25°c, (77°f). Specifications are subject to change without notice. Environment application field for use in high-voltage substations an...

  • Page 43

    Bd0333fe zp-bd03e mom2 43.

  • Page 44: Index

    44 mom2 zp-bd03e bd0333fe index index a accessories ................................................... 12 application examples..................................... 32 audio signals ................................................. 20 b basic technical description .............................. 8 ba...

  • Page 45

    Bd0333fe zp-bd03e mom2 45 index stand-by / wake up ....................................... 11 t test a cb by injecting through the ground ca- bles ............................................................. 33 test a cb using dualground ......................... 33 test button .......................

  • Page 46

    46 mom2 zp-bd03e bd0333fe index.

  • Page 48

    Www .Megger.Com your “one stop” source for all your electrical test equipment needs megger is a leading global manufacturer and supplier of test and measurement instruments used within the electric power, building wiring and telecommunication industries. With research, engineering and manufacturing ...